7. SEGMENT DATA

We measure segment performance based on operating income (loss). Excluding discontinued operations our broadcast segment includes stations in 45 markets located predominately in the eastern, mid-western and southern United States. In 2012, we determined that the operating results of WLAJ-TV and WLWC-TV should be accounted for as discontinued operations and are not included in our consolidated results of continuing operations for the three months ended March 31, 2013 and 2012. Our other operating divisions segment primarily earned revenues from sign design and fabrication; regional security alarm operating and bulk acquisitions and real estate ventures. All of our other operating divisions are located within the United States. Corporate costs primarily include our costs to operate as a public company and to operate our corporate headquarters location. Corporate is not a reportable segment. We had approximately $171.5 million and $170.8 million of intercompany loans between the broadcast segment, other operating divisions segment and corporate as of March 31, 2013 and 2012, respectively. We had $4.9 million and $5.0 million in intercompany interest expense related to intercompany loans between the broadcast segment, other operating divisions segment and corporate for the three months ended March 31, 2013, and 2012, respectively. Intercompany loans and interest expense are excluded from the tables below. All other intercompany transactions are immaterial.

Financial information for our operating segments are included in the following tables for the periods presented (in thousands):

For the three months ended March 31, 2013	Broadcast		Other Operating Divisions			Corporate			Consolidated
Revenue	$	271,155	$	11,463		$	—		$	282,618
Depreciation of property and equipment	13,784		469			342			14,595
Amortization of definite-lived intangible assets and other assets	14,867		1,135			—			16,002
Amortization of program contract costs and net realizable value adjustments	18,861		—			—			18,861
General and administrative overhead expenses	10,129		297			824			11,250
Operating income (loss)	65,132		(309		)	(1,167		)	63,656
Interest expense	—		730			36,967			37,697
(Loss) from equity and cost method investments	—		(1,052		)	—			(1,052		)

For the three months ended March 31, 2012	Broadcast		Other Operating Divisions			Corporate			Consolidated
Revenue	$	208,426	$	13,948		$	—		$	222,374
Depreciation of property and equipment	8,481		407			383			9,271
Amortization of definite-lived intangible assets and other assets	4,487		1,332			—			5,819
Amortization of program contract costs and net realizable value adjustments	14,100		—			—			14,100
General and administrative overhead expenses	7,903		611			853			9,367
Operating income (loss)	61,802		(672		)	(1,236		)	59,894
Interest expense	—		854			26,533			27,387
Income from equity and cost method investments	—		1,276			—			1,276